Dolby Laboratories DP569 - Manual (Page 24)

Model DP569 User’s Manual Applications
3-2
MUX DP569
Main
Out
L/R
Ls/Rs
C/LFE
Digital
In
Multiplexer
Dolby
Digital Input
GPI
Input
GPI
Status
Alarms and Status
MPEG Transport
stream output
Optional Preset Recall
via automation
Ref In
Ref Out
48 kHz
Reference
Figure 3-1 DP569 Integrated with a Multiplexer
3.1.2 Integration within a Dolby E System
More and more broadcast systems are using Dolby E to distribute multiple channels
of audio within and between TV stations. Dolby E will provide both the audio and
metadata for the DP569 encoder, in effect “remote controlling” the DP569 settings.
Consequently, the configuration of the DP569 itself is simplified yet the whole audio
transmission is highly flexible.
An example of a 5.1-channel installation is shown in Figure 3-2. Stereo or mono
installations will follow a similar pattern. The DP572 decodes the Dolby E signal,
extracts the audio and metadata, and sends it to the DP569.
Connect the DP572’s Digital Output channels 1/2, 3/4, 5/6 to the DP569’s Digital
Input channels 1/2, 3/4, 5/6, respectively. Install 75
Ω terminators if the loop-through
BNC connectors on the DP569 are unused.
Use a standard DB9 male-to-male cable (not a null modem) to connect the Metadata
output on the DP572 decoder to the Metadata input on the DP569. It is possible to
connect one DP572 to many DP569 units by simply cascading the metadata
connection.
When a DP569 receives external metadata, the following parameters must be
explicitly set:
• Set the Metadata Source to the appropriate program—this is usually
Program 1. See Section 4.2.2.
• Set the Reversion Mode. See Section 4.2.2 .
This can also be done quickly by recalling factory preset 1 from the front panel (a
copy is stored in preset 28).